US20080019420A1 - Exchange of detection and avoidance information - Google Patents

Exchange of detection and avoidance information Download PDF

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Publication number
US20080019420A1
US20080019420A1 US11/726,737 US72673707A US2008019420A1 US 20080019420 A1 US20080019420 A1 US 20080019420A1 US 72673707 A US72673707 A US 72673707A US 2008019420 A1 US2008019420 A1 US 2008019420A1
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US
United States
Prior art keywords
wireless device
information
recited
protected
received
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/726,737
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English (en)
Inventor
Nicholas Carbone
Timothy Gallagher
Nishant Kumar
Siddharth Shetty
James Taylor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Staccato Communications Inc
Original Assignee
Staccato Communications Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Staccato Communications Inc filed Critical Staccato Communications Inc
Priority to US11/726,737 priority Critical patent/US20080019420A1/en
Assigned to STACCATO COMMUNICATIONS, INC. reassignment STACCATO COMMUNICATIONS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TAYLOR, JAMES LAURENCE, CARBONE, NICHOLAS MICHAEL, GALLAGHER, TIMOTHY LEO, KUMAR, NISHANT, SHETTY, SIDDHARTH
Publication of US20080019420A1 publication Critical patent/US20080019420A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • a protected wireless device and an interfering wireless device are separate systems.
  • a protected wireless device and an interfering wireless device are included in the same system (i.e., they are collocated). It would be desirable to develop new techniques associated with detection and/or avoidance that, for example, offer a balance between protection of a protected wireless device and throughput of the interfering wireless device and/or can be used with collocated devices.
  • FIG. 4 is a diagram illustrating an embodiment of a beacon with information elements used to exchange detection and/or avoidance information.
  • FIG. 5 is a diagram illustrating an embodiment of a time frequency interleaving (TFI) channel.
  • FIG. 9 is a diagram illustrating an embodiment of a mobile telephone and some devices it communicates with.
  • FIG. 10 is a flowchart illustrating an embodiment of a process for obtaining information specified by a regulatory agency.
  • information is included in a beacon, indicating avoided bands and/or subcarriers at 306 .
  • the information included at 302 is encoded or described differently than the information included at 306 , such as by using different information elements. In some embodiments, this enables a wireless device that receives a beacon to know which bands and/or subcarriers are being avoided because the transmitting wireless device actually detected a protected wireless device, as opposed to because a (e.g., 1-hop) neighbor detected a protected wireless device.
  • information element 408 is included in beacon 400 if step 302 is performed. In some embodiments, information element 410 is included in beacon 400 if step 306 is performed.
  • Various beacons will therefore include neither, one, or both of information elements 408 and 410 .
  • Each of information elements 408 and 410 includes an identifier, length, and associated information. In some embodiments, the identifiers are unique identifiers that allow information elements 408 and 410 to be distinguished from each other, as well as other information elements.
  • the length fields describe how long each information element is (e.g., in units of bytes).
  • FIG. 5 is a diagram illustrating an embodiment of a time frequency interleaving (TFI) channel.
  • the wireless devices are WiMedia UWB devices. Packets or frames are made up of Orthogonal Frequency-Division Multiplexing (OFDM) symbols and are transmitted on a wireless channel.
  • OFDM Orthogonal Frequency-Division Multiplexing
  • WiMedia UWB there are two types of wireless channels: time frequency interleaving (TFI) and fixed frequency interleaving (FFI).
  • TFI channels use a plurality of bands that are repeated; FFI channels use a single band.
  • a TFI channel is shown with a hop pattern of band 1, band 2, and band 3. In some embodiments, some other channel is used besides the example shown herein.
  • FIG. 6 is a diagram illustrating an embodiment of subcarriers in bands that are avoided.
  • a wireless device is using the TFI channel shown in FIG. 5 .
  • subcarriers 100 thru 106 (inclusive) in band 2 are avoided.
  • the wireless device avoiding these subcarriers in band 2 detected a protected wireless device; in some embodiments, the wireless device avoiding the example subcarriers is, for example, 1-hop away from a detecting wireless device.
  • a 0 indicates that the corresponding subcarrier is being used and a 1 indicates that it is being avoided.
  • the polarity is reversed.
  • FIG. 7 is a diagram illustrating an embodiment of avoided subcarriers and/or bands described using run length encoding.
  • the avoided subcarriers and bands shown in FIG. 6 are run length encoded.
  • some other type of run length encoding is used.
  • a FFI channel is used and avoided subcarriers in an FFI channel are run length encoded.
  • the most significant bit (MSB) of each byte is used to indicate what symbol is being repeated (e.g., a 0 or a 1) and the remaining bits are equal to one less than the number of times that symbol is repeated.
  • the first byte (01111111) indicates that a 0 is repeated 128 times; this corresponds to using all 128 subcarriers in band 1.
  • the second byte (01100011) indicates that a 0 is repeated 100 times, corresponding to subcarriers [0, 99] in band 2.
  • the third byte (10000110) indicates that a 1 is repeated 7 times, corresponding to subcarriers [100, 106] in band 2; those subcarriers are avoided.
  • the fourth byte (00010100) indicates that a 0 is repeated 21 times, corresponding to subcarriers [ 107 , 127 ] in band 2.
  • the fifth byte (01111111) indicates that a 0 is repeated 128 times; this corresponds to using all 128 subcarriers in band 3.
  • a protected device is collocated with an interfering device.
  • the following figures show some embodiments of collocated devices and some examples of information that is exchanged.
  • a system that includes collocated wireless components is a system other than a mobile phone.
  • personal digital assistants and laptop computers may have collocated wireless components.
  • a system includes a different set of collocated wireless components.
  • a Bluetooth component or an IEEEE 802.11 a/b/g (WiFi) component may be included in addition to or as an alternative to a component shown in the example of FIG. 8 .
  • FIG. 9 is a diagram illustrating an embodiment of a mobile telephone and some devices it communicates with.
  • mobile telephone 900 includes collocated GPS, UWB, and mobile telephony components. Each component includes a transceiver configured to transmit and receive according its respective protocol.
  • RSSI Received Signal Strength Indication
  • base station 904 may identify a neighborhood or area in which base station 904 provides service.
  • mobile telephone 900 obtains location and/or RSSI information from base station 904 .
  • a UWB component in mobile telephone 900 uses some or all of this information to coexist with collocated wireless components.
  • different information is obtained from different sources.
  • Weights are assigned to position related information at 1002 .
  • information from one source is more reliable, detailed, timely, or otherwise useful than information from another source and the weights assigned reflect this.
  • location information from a mobile telephone base station or GPS position information has the highest weight.
  • Information from a fixed infrastructure network, such as from an IEEE 802.11 access point, is assigned a lower weight.
  • Time zone information from a computer is assigned the lowest weight.
  • rankings or weights can be used.
  • a previous country or region is stored and used to determine the current country or region. For example, a mobile telephone typically stays in a single country or region. If no position and/or time zone information is available, the country or region is set to a saved country or region. In some embodiments, position and/or time information is available but is contradictory with respect to saved location information, or has a low priority. The previous country or region in some embodiments is used even if the obtained information indicates another region or country.
  • a UWB transmit power mask information is obtained for a country or region.
  • a Transmit Power Control (TPC) module within a UWB component may use a transmit power mask to set appropriate parameters.
  • TPC Transmit Power Control
  • a permitted set of UWB channels is obtained for a country or region at 1008 .
  • some countries or regions may have specific restrictions on usable bands by UWB devices. Certain bands in certain countries are restricted because they are, for example, used by the military or are already licensed.
  • a UWB component uses the permitted set of channels to select a wireless channel comprising of one or more bands. In some cases, a band permitted for UWB use in one country is not permitted to be used in another country.
  • FIG. 11 is a flowchart illustrating an embodiment of a process for avoiding a paging time of a mobile telephone.
  • the example process is performed by a CDMA system where a mobile telephone and a base station use pages to alert the mobile telephone there is an incoming call.
  • the telephone and base station exchange a communication indicating whether or not there is an incoming call.
  • the communication is exchanged on a particular frequency referred to as the paging band.
  • a CMDA telephone often powers down some or all of a mobile telephony component to save power, and prior to the paging time the mobile telephony component is powered up.
  • paging information is transmitted to other wireless devices at 1104 . It may be desirable for nearby wireless devices without a collocated mobile telephony component to avoid the paging time and paging band of the mobile telephone. In some embodiments, this information is included in a beacon frame, or may be included a dedicated frame associated with transmitting paging information.
  • a sensitivity of a mobile telephony component to interference is approximated. For example, if the RSSI level is relatively high, the mobile telephone signal is robust in the presence of interference from the collocated UWB component. In some cases, an RSSI level is a coarse measurement, and the sensitivity level approximated at 1202 is similarly coarse. In some cases, a relatively small number of possible sensitivity levels are used.
  • the channel In FFI mode, the channel is a single band, whereas in TFI mode the channel includes multiple bands that the UWB device alternates through.
  • a UWB component may decide to operate in FFI mode when a collocated mobile telephony component is far away from a base station and operate in TFI mode when closer to a base station.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
US11/726,737 2006-03-21 2007-03-21 Exchange of detection and avoidance information Abandoned US20080019420A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/726,737 US20080019420A1 (en) 2006-03-21 2007-03-21 Exchange of detection and avoidance information

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US78420406P 2006-03-21 2006-03-21
US79165706P 2006-04-12 2006-04-12
US11/726,737 US20080019420A1 (en) 2006-03-21 2007-03-21 Exchange of detection and avoidance information

Publications (1)

Publication Number Publication Date
US20080019420A1 true US20080019420A1 (en) 2008-01-24

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US11/726,737 Abandoned US20080019420A1 (en) 2006-03-21 2007-03-21 Exchange of detection and avoidance information

Country Status (5)

Country Link
US (1) US20080019420A1 (fr)
EP (1) EP1997087A2 (fr)
JP (1) JP2009530984A (fr)
KR (1) KR20080113032A (fr)
WO (1) WO2007109341A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105074385A (zh) * 2013-02-26 2015-11-18 北极星工业有限公司 休闲车辆交互式遥测、测绘和行程规划系统
US10584977B2 (en) 2013-02-26 2020-03-10 Polaris Industries Inc. Recreational vehicle interactive telemetry, mapping, and trip planning system
US11102612B2 (en) 2016-02-10 2021-08-24 Polaris Industries Inc. Recreational vehicle group management system
US11209286B2 (en) 2013-02-26 2021-12-28 Polaris Industies Inc. Recreational vehicle interactive telemetry, mapping and trip planning system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8531332B2 (en) * 2010-03-22 2013-09-10 Qualcomm Incorporated Anti-spoofing detection system
US10256955B2 (en) 2015-09-29 2019-04-09 Qualcomm Incorporated Synchronization signals for narrowband operation
CN111262617B (zh) * 2020-01-16 2021-09-21 南京邮电大学 一种基于多颗低轨卫星协作的频谱感知方法

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105074385A (zh) * 2013-02-26 2015-11-18 北极星工业有限公司 休闲车辆交互式遥测、测绘和行程规划系统
US20160003621A1 (en) * 2013-02-26 2016-01-07 Polaris Industries Ins. Recreational vehicle interactive telemetry, mapping, and trip planning system
US9644969B2 (en) * 2013-02-26 2017-05-09 Polaris Industries Inc. Recreational vehicle interactive telemetry, mapping, and trip planning system
US10203220B2 (en) 2013-02-26 2019-02-12 Polaris Industries Inc. Recreational vehicle interactive telemetry, mapping, and trip planning system
US10584977B2 (en) 2013-02-26 2020-03-10 Polaris Industries Inc. Recreational vehicle interactive telemetry, mapping, and trip planning system
US11209286B2 (en) 2013-02-26 2021-12-28 Polaris Industies Inc. Recreational vehicle interactive telemetry, mapping and trip planning system
US11102612B2 (en) 2016-02-10 2021-08-24 Polaris Industries Inc. Recreational vehicle group management system
US11963064B2 (en) 2016-02-10 2024-04-16 Polaris Industries Inc. Recreational vehicle group management system

Also Published As

Publication number Publication date
WO2007109341A2 (fr) 2007-09-27
WO2007109341A3 (fr) 2008-12-31
WO2007109341A9 (fr) 2008-01-24
JP2009530984A (ja) 2009-08-27
EP1997087A2 (fr) 2008-12-03
KR20080113032A (ko) 2008-12-26

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